Fix StoreIndexedInstr input representation requirements for Int32/Uint32 arrays.

runtime/vm/assembler_mips.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_MIPS_H_
 #define VM_ASSEMBLER_MIPS_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_mips.h directly; use assembler.h instead.
 #endif
@@ skipping 838 matching lines @@
   }
 
   void LoadImmediate(Register rd, int32_t value) {
     ASSERT(!in_delay_slot_);
     if (Utils::IsInt(kImmBits, value)) {
       addiu(rd, ZR, Immediate(value));
     } else {
       const uint16_t low = Utils::Low16Bits(value);
       const uint16_t high = Utils::High16Bits(value);
       lui(rd, Immediate(high));
-      ori(rd, rd, Immediate(low));
+      if (low != 0) {
+        ori(rd, rd, Immediate(low));
+      }
     }
   }
 
   void LoadImmediate(DRegister rd, double value) {
     ASSERT(!in_delay_slot_);
     FRegister frd = static_cast<FRegister>(rd * 2);
     const int64_t ival = bit_cast<uint64_t, double>(value);
     const int32_t low = Utils::Low32Bits(ival);
     const int32_t high = Utils::High32Bits(ival);
     if (low != 0) {
@@ skipping 248 matching lines @@
   }
 
   void Ret() {
     jr(RA);
   }
 
   void SmiTag(Register reg) {
     sll(reg, reg, kSmiTagSize);
   }
 
+  void SmiTag(Register dst, Register src) {
+    sll(dst, src, kSmiTagSize);
+  }
+
   void SmiUntag(Register reg) {
     sra(reg, reg, kSmiTagSize);
   }
 
   void SmiUntag(Register dst, Register src) {
     sra(dst, src, kSmiTagSize);
   }
 
   void LoadFromOffset(Register reg, Register base, int32_t offset) {
     ASSERT(!in_delay_slot_);
@@ skipping 241 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_MIPS_H_